Picture-exhibiting device.



A. A. JACKSON. PICTURE EXHIBITING DEVICE.

APPLIOATION FILED AUG. 29, 1913.

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A. A. JACKSON. PICTURE EXHIBITING DEVICE.

APPLICATION FILED AUG. 29, 1913.

1,103,360. Patented July 14,1914,

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ALIElB/ED JACKSON, NORWALK, CONNECTICUT.

PICTTIRE-EXHIBITING DEVICE.

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To all whom it may concern Be it known that I, ALFRED A. JACKSON, a citizen of the United States of America, and a resident of Norwalk, county of Fairfield, and State of Connecticut, have invented certain new and useful Improvements in Pictur-Exhibiting Devices, of which the following is a specification.

The object of this invention is to produce a picture exhibiting device in which a series of pictures or reading matter or the like are successively brought into position to be viewed and illuminated by an electric lamp, the change of the pictures being under the control of a thermostatic flasher and the connections being so related that a change of the pictures takes place while the lamp is extinguished.

In the accompanying two sheets of drawings which form a part of this application Figure 1 is a side elevation of the lamp, condensing lens and slide holder of a stereopticon embodying my invention. Fig. 2 is a section on the line IIII of Fig. 1.

The apparatus comprises a picture carrier 1 in the form of a disk mounted on a shaft 2 and provided with a series of openings in front of which lantern slides 3 3 are carried. Behind the carrier is a condensing lens 4 and back of this an electric lamp 5. On the shaft is a ratchet 6 which is turned with a step-by-step movement by the armature lever T of an actuating magnet 8. A hook pawl 9 engages the ratchet and operates the apparatus when the armature is thrown back by its spring 10. The armature lever is latched forward by a hooked armature lever 11 of a magnet 12 the function of which is to release the picture changing mechanism and permit it to bring the next picture in front of the lamp. This magnet is consequently the operating magnet. A thermostatic flasher 13 controls the electric circuits. One circuit is from a binding post 14, through lead 15, lamp, lead 16, contact screw 17 of the flasher, lead 18, operating magnet, and lead 19 to a second binding post 20. This circuit will be considered as in two series sections joined at the contact screw of the flasher, the first section including the lamp and the second section including the operating magnet. The operating magnet is of high resistance so that the current flowing over the circuit will operate the magnet but Specification of Letters Patent.

Application filed August 29, 1913.

Patented July 14, 1914. Serial No. 787,280.

no; light the lamp. A. branch of the second section is run in parallel from the flasher contact screw through lead 21, flasher winding 22 and lead 23 to the second binding post. The second section therefore includes the operating magnet and the flasher winding. As shown they are in parallel, but this relation is not essential. Heating of the flasher bows its core strip 2 1 into contact with the screw and establishes a shunt around the second branch of the circuit from the contact screw to the second binding post through the core strip, thereby diverting the current from the operating magnet and flasher winding and affording a low resistance path from the lamp to the second binding post and lighting the lamp. The motive power for changing the pictures is immaterial to the operation above described. As shown, however, the actuating magnet is fed from the same current, and the connections are from the first binding post through lead 25, actuating magnet, lead 26, contacts 27 2 7, which are separated when the armature lever of the magnet is drawn down, and lead 28 to the contact screw of the flasher. This magnet is in the first section of the above circuit with the lamp, and in parallel therewith, but the parallel relation is not essential. This magnet is so wound that it only receives suflicient current for its operation when the second section of the circuit is shunted by the flasher.

In operation, when the current is turned on and the flasher is cold, the flasher contact is open, and the current flows through the first section of. the circuit including the lamp and actuating magnet, but without lighting the lamp or operating the magnet owing to the resistance in the second section of the circuit which includes the flasher coil and operating magnet. The latter operates and releases the armature lever of the actuating magnet, which is thrown back by its spring and the hook pawl connected to it engages the ratchet and changes the picture. The flasher on heating closes the shunt and sufiicient current flows to light the lamp. Sufiicient current also flows through the actuating magnet to draw up its armature which becomes latched forward and while latched the armature lever presses against and separates the contact springs in the circuit to save current. The shunt also diverts the current from the flasher coil so that the flasher will cool oil? and open its contact when the operation will repeat.

What I claim as new, and desire to secure by Letters Patent of the United States, is

1. In a picture exhibiting device, the combination of a picture carrier, an actuating magnet and armature therefor, means for returning the armature for step-by-step movement of the carrier, a latch for holding the armature, an operating magnet for controlling the latch, an electric lamp, a thermostatic flasher, a circuit in two series sections, one section being through the lamp and actuating magnet and the other section being through the operating magnet, a shunt tor the operating magnet, and means operated by the flasher for opening and closing the shunt, substantially as described.

2. In a picture exhiblting device, the combinatlon of a plcture carrier, an actuating Copies of this patent may be obtained for magnet and armature therefor, means for returning the armature for step-bystep movement of the carrier, a latch for holding the armature, an operating magnet for controlling the latch, an electric lamp, a thermostatic flasher and inding therefor, a circuit in two series sections, one section being through the lamp and actuating magnet and the other section being through the flasher Winding and operating magnet a shunt for the flasher winding and operating magnet, and means operated by the fiasherfor opening and closing the shunt, substantially as described. I

Signed at Bronx, New York, N. Y., this 28th day of August 1913.

ALFRED A. JACKSON.

WVitnesses a V. D. STEEN,

G120. A. BLooMFmLo.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

